Lewis Short
ăcontĭas | ăcontĭae, ārum (noun M) = ἀκοντίας: .
* A quick-darting serpent, Amm. 22, 15, 27.
* In plur., , , = ἀκοντίαι, meteors or shooting-stars with dartlike trains, Plin. 2, 25, 22, § 89.
Charlton T. Lewis, Charles Short, A Latin Dictionary